SQL Server

Generate an ECDSA Key

See more ECC Examples

Demonstrates how to generate an ECDSA key. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    -- Create a Fortuna PRNG and seed it with system entropy.
    -- This will be our source of random data for generating the ECC private key.
    DECLARE @fortuna int
    EXEC @hr = sp_OACreate 'Chilkat.Prng', @fortuna OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @entropy nvarchar(4000)
    EXEC sp_OAMethod @fortuna, 'GetEntropy', @entropy OUT, 32, 'base64'
    EXEC sp_OAMethod @fortuna, 'AddEntropy', @success OUT, @entropy, 'base64'

    DECLARE @ecc int
    EXEC @hr = sp_OACreate 'Chilkat.Ecc', @ecc OUT

    -- Generate a random ECC private key on the secp256r1 curve.
    -- Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

    DECLARE @privKey int
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @privKey OUT

    EXEC sp_OAMethod @ecc, 'GenKey', @success OUT, 'secp256r1', @fortuna, @privKey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @ecc, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fortuna
        EXEC @hr = sp_OADestroy @ecc
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    EXEC sp_OAMethod @privKey, 'GetXml', @sTmp0 OUT
    PRINT @sTmp0

    -- Save the private key to PKCS8 encrypted PEM
    -- (The private key can be saved in a variety of different formats. See the online reference documentation.)
    EXEC sp_OAMethod @privKey, 'SavePkcs8EncryptedPemFile', @success OUT, 'pemPassword', 'myPemFiles/eccKey123.pem'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @privKey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END


    PRINT 'finished.'

    EXEC @hr = sp_OADestroy @fortuna
    EXEC @hr = sp_OADestroy @ecc
    EXEC @hr = sp_OADestroy @privKey


END
GO